Improvement in brick-kilns



'UNITED STATES 'PATENT GrFIcE.

JOHN ErsELn, or ANN Anson, MICHIGAN.

IMPROVEMENT IN BRICK-KILNS.`

Specification forming part of Letters Patent No. 126,040, dated April23, 1872.

To lwhom it may concern:

Be it knownthat I, JOHN EISELE, of Ann Arbor, in the county of Washtenawand State of Michigan, have invented a new and useful Improvement inPerpetual- Burning Brick- Kilns;A and I do declare that the following isa true and accurate description thereof, reference being had to theaccompanying drawing and to the letters of reference marked thereon andbeing a part of this specification, in which- Figure 1 is a perspectiveview of my kiln, with a portion of the front wall broken away. Fig. 2 isa top plan of 'the kiln; and Fig. 3 is an elevation of the division-wallof a coolingchamber, with the truck run out.

y utilized in drying and partially burning those subsequently molded andplaced in the kiln on top of them. The invention consists in thepeculiar construction of a permanent kiln with one or moreburning-chambers having hollow division-walls between them, in whichhollow walls sand can be burned for sanding the molds and green brick;and in the improved construction and arrangement of its severaloperative parts, all as is more fully hereinafter set forth.

In the drawing, A represents the front side and rear walls of arectangular brick-kiln, preferably constructed of well-burned brick, andabout sixteen inches in thickness. The whole should be properly bracedand stayed in a stout wooden frame-work, B. The kiln is divided fromfront to rear by a double wall, C, in which are formed two chambers, D,having openings E at the bottom, closed by proper doors. F arefire-doors on the front and back faces of the kiln, around which extendsa platform, G. That part of the kiln below the platform I call thecooling-chambers, and above it the burning-chambers, although the kilnis open from top to' bottom. The cooling-chambers have their front andrear walls cut away,

and are provided with suitable doors for closing them. A suitable trackor tram-way extends through the bottom of the cooling-chambers, and oneach track is a truck, H, whose platform has nearly the area of eachchamber. I is a beam, whose ends are engaged with slides or guides inthe vertical portions of the frame-work B, forming the jambs of thedoorways of the cooling-chambers. J are jackscrews at either side of thedoor-ways, threaded in said beams. Similar beams and screws are in likemanner arranged at the rear end of the kiln.

I will now describe the construction of a block from each days productof molded bricks. In starting a new kiln, however, I prefer to use forthe lower blocks burned bricks laid up in the same mannerthat is to say,set six high on the platform of a truck, and on edge, with the usualinterstices between them, and then nish up six high, but leaving thearches K in them, as shown, extending through from front to rear of theblock K so constructed, which is sixteen bricks long, covering theplatform of the truck. 0n top of the block a course of bricks, a, isedged up, leaving a space between each row from front to rear; thesebricks breaking joints with the top-course bricks. The truck with itsblock is now run into the cooling-chamber, and two similar blocks builtupon it, the arches of the middle one coming abreast of the lire-doors Fof the kiln-walls. The fires are now started in the arches, and theburning of the upper portions of the fired block, and the lower portionof the one above it, proceeds in the usual manner. The ascending wasteheat, permeatin g the mass above, first drives oft' its water-smoke, andthen dries it. When the red block is sufficiently burned I cease firing,and over the beams I, which` should be now at the top of the screws, Iinsert heavy bars b of iron, lpassing them between the rows a of thelower block, andA coming out over the beam at the rear side of the kiln.(I would here state that the bottom rows of bricks in each block shouldbe so laid that the bricks will bear on these bars, and not theirjoints.) I then raise up the superincumbent blocks a little, open thedoors or remove them from the cooling-chambers, run out the truck withthe lower block, run in another truck, and then lower the mass until itrests upon the truck; remove the bars and close up the cooling-chambers. The arches of the upper block will now be abreast of there-doors, when firing again proceeds. During the time of burning theburned block is cooling off in the chamber below. Before the rst blockis removed, however, another block should be built upon the mass in thekiln. In this way I continue the process, removing each day a block ofburned brick, and adding a days product of green brick to thekiln-chambers, utilizing heat which would otherwise be wasted, andysaving proportionately in fuel.

The drying and burning of sand for sanding the molds and green brick isa considerable item of expense in the yard. By filling the spaces orchambers D of the hollow walls with sand a constant supply may be had,drawing off through the doors E as required.

What I claim as my invention, and desire to secure by Letters Patent,is-

l.4 The kiln A, provided with the sandchambers D D and the openings E E,constructed and arranged substantially as described and shown, for thepurposes set forth.

2. The combination of the kiln A, provided with the sand-chamber D, andthe burning-

